$ git clone -n https://src.fedoraproject.org/rpms/rust-async-broadcast.git /var/lib/mock/f38-build-side-43-rust-devel-1417026-31458/root/chroot_tmpdir/scmroot/rust-async-broadcast
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1417026-31458/root/chroot_tmpdir/scmroot/rust-async-broadcast'...
$ git fetch origin 166bb5e47b5e80a8c5213151bc17cde974c39168:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-broadcast
 * [new ref]         166bb5e47b5e80a8c5213151bc17cde974c39168 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 166bb5e Update to version 0.5.1; Fixes RHBZ#2155926